Don't send unnecessary ExtensionMsg_Loaded IPCs.

extensions/renderer/script_context.h

Index: extensions/renderer/script_context.h
diff --git a/extensions/renderer/script_context.h b/extensions/renderer/script_context.h
index 012f11f779b79259e9d2a513ad00df8cdd811c01..945eccbfd25ddd15a58569fab3e1cc0b69a7c85e 100644
--- a/extensions/renderer/script_context.h
+++ b/extensions/renderer/script_context.h
@@ -123,10 +123,10 @@ class ScriptContext : public RequestSender::Source {
   Feature::Availability GetAvailability(const std::string& api_name);
 
   // Returns a string description of the type of context this is.
-  std::string GetContextTypeDescription();
+  std::string GetContextTypeDescription() const;
 
   // Returns a string description of the effective type of context this is.
-  std::string GetEffectiveContextTypeDescription();
+  std::string GetEffectiveContextTypeDescription() const;
 
   v8::Isolate* isolate() const { return isolate_; }
 
@@ -180,6 +180,9 @@ class ScriptContext : public RequestSender::Source {
   // no exception thrown), false if it does not (i.e. an exception was thrown).
   bool HasAccessOrThrowError(const std::string& name);
 
+  // Returns a string representation of this ScriptContext, for debugging.
+  std::string GetDebugString() const;
+
  private:
   class Runner;